International Journal of Thermofluids,
Год журнала:
2023,
Номер
20, С. 100509 - 100509
Опубликована: Ноя. 1, 2023
In
this
study,
a
magnetohydrodynamics
natural
convective
numerical
investigation
about
fluid
flow
and
heat
transfer
is
completed
in
closed
cavity.
Due
to
vast
real
life
applications
of
nanofluids
as
well
hybrid
thermal
engineering
manufacturing
processes
such
micro-electronics,
exchanger,
chemical
sensors,
drug
transport,
solar
cells,
etc.,
the
are
taken
medium
domain.
A
prismatic
shaped
close
cavity
considered
with
circular
hot
surface
middle
part
The
upright
walls
cold
surface.
Rest
thermally
insulated.
There
horizontal
magnetic
field
which
act
toward
suspension
water
Cu
TiO2
nanoparticles
nanofluids.
Galerkin
weighted
residual
finite
element
method
used
solve
associated
governing
equations.
To
express
finding,
streamlines
isotherm
lines
graphically
physically
for
numerous
values
involved
parameter
Rayleigh
number
(103
≤
Ra
106),
Hartmann
(0
Ha
100),
nanoparticle
volume
fraction
φ
0.06).
response
methodology
applied
visualize
3D
effect,
study
sensitivity
input
factors
on
function.
enactment
nanofluid
developed
by
higher
inclusion
nanoparticles.
Reverse
behaviors
should
be
observed
an
increasing
influence.
Numerical Heat Transfer Part B Fundamentals,
Год журнала:
2024,
Номер
unknown, С. 1 - 27
Опубликована: Апрель 22, 2024
This
numerical
study
investigates
mixed
convection
heat
transfer
in
a
two-dimensional
irregularly-shaped
enclosure
with
nanofluid-saturated
porous
medium.
The
has
wavy
vertical
walls,
centered
triangular
block,
and
lid
split
into
two
regions
moving
opposite
directions.
Transport
equations
are
solved
using
the
finite
element
method
under
varied
Darcy
(10−5
to
10−1),
Reynolds
(50
200),
Richardson
(0.1
10),
amplitude
(0
0.2),
nanoparticle
volume
fraction
0.1)
numbers.
Results
demonstrate
combined
effects
of
forced
from
motion
natural
temperature
differences
significantly
enhance
transfer.
walls
induce
secondary
flows
periodic
disruption
thermal
boundary
layers.
Increasing
number
enables
deeper
penetration
block.
Copper
nanoparticles
incrementally
improve
conductive
more
prominent
at
higher
numbers
as
buoyancy
forces
influence
convection.
provides
novel
insights
synergistically
utilizing
geometries,
nanofluids,
media,
active
pumping
for
optimizing
irregular
enclosures
electronics
cooling
management.
International Journal of Ambient Energy,
Год журнала:
2024,
Номер
45(1)
Опубликована: Апрель 1, 2024
Non-Newtonian
fluid
flows
are
a
present
advancement
in
industrial
heat
transfer
and
mechanics,
with
numerous
applications
engineering
field
as
well
real
life
such
food
industry,
petroleum
refiners,
biological
processes,
biomedical
engineering,
chemical
etc.
As
result,
this
numerical
investigation
explore
the
flow
behaviour
of
mixed
convective
non-Newtonian
power-law
nanofluid
(Al2O3-H2O)
rectangular
enclosure.
The
physical
model
is
considered
two-dimensional
enclosure
consisting
two
rotating
hot
cylinders
(TH)in
middle
part
cavity,
where
one
moving
clockwise
other
counter-clockwise
directions.
left
right
walls
chamber
taken
relatively
low
temperature
(TC)
while
remaining
top
bottom
insulated.
important
thermophysical
property,
viscosity,
depends
on
shear
rate,
thermal
conductivity
temperature.
related
governing
equations
solved
by
using
finite
element
method,
to
describe
response
surfaces
surface
methodology
(RSM)
applied.
influence
relevant
non-dimensional
parameters,
Prandtl
number
(Pr=6.2),
Reynolds
(Re=10,
100,
200
400),
index
(n
=
0.6,
0.8,
1.0
1.4),
Richardson
(Ri=1.0,
2.0,
4.0
6.0),
nanoparticle
volume
fraction
(ϕ=0.00,
0.01,
0.02
0.04),
explained
interpretation
streamlines,
isotherm
lines,
velocity
profile,
average
Nusselt
(Nuav).
To
visualise
surfaces,
2D
3D
contour
plots
RSM.
It
concluded
that
adding
into
base
fluid,
rate
developed
significantly.
Same
phenomena
exhibits
for
larger
magnitudes
Ri
Re.
And,
increasing
value
n
from
0.6
1.4,
Nuav
would
go
down
39.8
percent.
Results in Engineering,
Год журнала:
2024,
Номер
21, С. 101954 - 101954
Опубликована: Фев. 29, 2024
In
current
study,
the
steady
electrically
conducting
flow
of
micropolar
nanofluid
past
a
porous
stretched
surface
across
stagnation
points
is
investigated.
For
motivation
problem,
impressions
nonlinear
thermal
radiation
and
convectively
heated
have
been
analyzed.
additions,
influence
thermophoresis
heat
transfer
are
part
this
study.
The
governing
firm
PDEs
converted
to
system
coupled
ODEs
using
similarity
approach.
Moreover,
resulting
problem
numerically
integrated
with
aid
shooting
approach
by
utilizing
bvp4c
programmer
MATLAB.
numerical
outcomes
calculated
various
physical
parameter
values
contrasted
previously
published
results.
Numerical
quantities
like
velocity,
rotation,
temperature
concentration
profile
for
involving
parameters
such
as
Prandtl
number
Pr,
R,
slip
α,
Nt,
suction/injection
velocity
fw,
Brownian
motion
Nb,
magnetic
M
Lewis
Le
also
computed
deliberated
in
consideration.
Results in Engineering,
Год журнала:
2023,
Номер
19, С. 101380 - 101380
Опубликована: Авг. 25, 2023
The
present
article
explores
flow
of
ternary
hybrid
nanofluid
(THN)
between
two
parallel
plates
in
which
upper
one
is
squeezing
motion.
study
has
its
importance
industrial
applications,
like
the
pistons
and
nozzles
engine
vehicles.
THN
(graphene-graphene
oxide-silver/water)
used
to
improve
efficiency
heat
carrier
fluid
by
synergetic
effects
nanoparticles.
Magnetic
field
thermal
radiation
are
also
included
problem.
Governing
mathematical
form
problem
constructed
using
a
modified
Buongiorno
model.
Dimensionless
system
ODEs
reduced
from
PDEs
through
transformations
further
simplified
towards
solution
with
numerical
approach
'bvp4c',
MATLAB
based
solver.
reliability
outcomes
confirmed
matching
them
previously
published
works.
findings
reveal
that
velocity
reduces
magnetic
parameters
mid-section
temperature
can
be
controlled
amount
nanoparticles
dispersed
into
it,
Prandtl
number
effect.
Overshoot
concentration
attained
for
higher
gradient
forces.
Also,
local
Nusselt
Sherwood
numbers
show
contrasting
trends
lower
types
(ternary/binary/unary),
effect,
but
remain
stationary
compression
That
means
better
transfer
characteristics
found
nanofluid,
plate,
drag
intensifies;
so
suitable
choices
considered
practical
purposes.
By
comparative
analysis,
it
concluded
performance
relatively
more
efficient
than
binary
unary
applications.
